(
off:	"v      "
null:	"v .    "
	"v ..   "
min:	"v ...  "
	"v .... "
	"v ....."
	"v :...."
max:	"v ::..."
	"v :::.."
full:	"v ::::."
mute on:	"V"
)

or

(
	"v    "
	"v .  "
	"v .: "
	"v .:}"
	"V"
)

or

(
	"v    "
	"v .  "
	"v .. "
	"v ..."
	"V"
)
